Match plate foundry molding machine

ABSTRACT

A foundry molding machine utilizing a match plate and two sets of rubber-lined cope and drag slip flasks with two stations; one station assembling one set of flasks with the match plate therebetween and then rolling over the flask-match-plate assembly to fill the drag with sand while supporting the assembly on the cope and jolting and applying a low-pressure preliminary squeeze to the sand within the drag, rolling the assembly back to fill the cope and then supporting the assembly on the sand within the drag for the application of jolt and high-pressure squeeze to the sand in both the cope and drag, separating the assembly and indexing the cope and drag vertically separated to a second station while simultaneously indexing the second set of flasks to the first station, holding the sand-rammed flasks vertically separated in the other station to permit coring and closing the flasks and stripping the sand cakes thus assembled therefrom to be placed on a bottom board while the second set of flasks are being filled and rammed at the first station; the indexing and rollover of such flasks being obtained each by a piston-cylinder assembly having controlled stroke deceleration on extension thereof.

United States Patent [72] Inventors Leon F. Miller FOREIGN PATENTS ROCK)River; 277 1 mjfiifi 3113i; iii/Till: #215583 {211 p No 6728065 8""a115, allot 863,078 3/1961 Great Britain 164/197 [22] Filed Oct 2, 967Primary Examiner-J. Spencer Overholser [45] Patented June 29, 1971Ass1s!antExaminer-John E. Roethel [73] Assignee The Sherwin-WilliamsCompany Atlorney Oberlin, Maky, Donnelly & Renner ABSTRACT: A foundrymolding machine utilizing a match [54] MATCH PLATE FOUNDRY MOLDINGMACHINE plate and two sets of rubber-lined cope and dra sli flasks g P29 Claims 40 Drawing Fig? with two stations; one station assembling oneset of flasks with [52] U 8 Cl 164/182 the match plate therebetween andthen rolling over the flask- 87 164/189 match-plate assembly to fill thedrag with sand while support- [5 1] Int Cl B52 l7 10 mg the assembly onthe cope and jolting and applying a low- [50] Fieid 124/1? pressurepreliminary squeeze to the sand within the drag, 2 I82 189' rolling theassembly back to fill the cope and then supporting 195 1 97 2 03 206 2692 i 2 9 i/407' 402; the assembly on the sand within the drag for theapplication of i v i jolt and high-pressure squeeze to the sand in boththe cope I 56] Rererenm Cited 3nd drag, selrlaarating the:1 assembly andindexing the cope and rag vertica y separate to a second station whilesimultane- 2 272 708 2/ STATES PATENTS ously indexing the second set offlasks to the first station, holdmes 164 383 in the sand-rammed flasksvertical] se arated th th 2,686,945 8/]954 Williams l64/209 stftion toermit corin and closin the t'l k :1 t 3,267,528 8/1966 Ellms 164/212 thesand c kes thus ass embled ther efrom :2 l ie glaze d i i s tlvuntgrnbogtom board while the second set of flasks are being filled oo anrammed at the first station; the indexin and roll ve f 2,443,312 6/1948Geiger et al. 91/407 X such flasks being obtained each by a piston-cylinder as s en:b l y 2,879,564 3/ 1959 Miller 164/409 X havingcontrolled stroke deceleration on extension thereof.

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1. A foundry molding machine comprising means operative to assemble copeand drag flasks with a match plate therebetween, means operative toinvert such assembly to place the drag flask up, means operative to fillsuch drag flask with sand, means operative to apply a low-pressuresqueeze to the sand within such drag flask, means operative to reinvertsuch assembly to place the cope flask up, means operative to fill suchcope flask with sand, and means operative simultaneously to apply ahigh-pressure squeeze to the sand in the cope and drag flasks.
 2. Afoundry molding machine as set forth in claim 1 wherein said meansoperative to assemble cope and drag flasks with a match platetherebetween comprises a vertically movable jolt table operative to joltsuch assembly in conjunction with the application of the low- andhigh-pressure squeeze.
 3. A foundry molding machine as set forth inclaim 1 including a vertically movable jolt table operative to assemblethe cope and drag flasks with the match plate therebetween, and alarge-diameter pneumatic squeeze piston-cylinder assembly verticallyaligned with said jolt table.
 4. A foundry molding machine as set forthin claim 1 including split trunnions projecting laterally from the copeand drag, and retractible trunnion supports operative to support suchassembly for inversion.
 5. A foundry molding machine as set forth inclaim 1 wherein said means operative to invert such assembly comprises apiston-cylinder assembly which includes means operative to obtaincontrolled deceleration at the end of its inversion stroke.
 6. A foundrymolding machine as set forth in claim 1 including a vertically movabletable operative to disassemble the cope and drag flasks and place thesame in vertically spaced alignment.
 7. A foundry molding machine as setforth in claim 1 including a vertically movable table operative todisassemble the cope and drag flasks and place the same in verticallyspaced alignment; and means operative to index such sand-filled flasksin such vertically spaced condition to a coring and closing station, andmeans operative at such station to strip the sand molds from the flaskand assemble such molds on a bottom board.
 8. A foundry molding machineas set forth in claim 1 wherein said means operative to fill the flaskswith sand comprises a horizontally movable sandbox with a slide platetherebeneath, and means operative to retract the slide plate frombeneath the sandbox to cause the sand within the box to fall within theflasks.
 9. A foundry molding machine as set forth in claim 1 includingindexing means supporting such flasks unassembled operative to shift theflasks in pairs to and from a coring and closing station.
 10. A foundrymolding machine comprising means operative to assemble a pair of flaskswith a pattern therebetween, means operative to fill one flask withsand, means operative preliminarily to squeeze such sand, meansoperative to invert such assembly, means operative to fill the otherflask with sand, and means operative simultaneously to squeeze the sandin both flasks.
 11. A foundry molding machine as set forth in claim 10including means operative to support such assembly on the preliminarilysqueezed sand in said one flask during the simultaneous squeezing ofsand in both flasks.
 12. A foundry molding machine as set forth in claim11 including means operative to jolt such assembly during thepreliminary and final simultaneous squeeze.
 13. A foundry moldingmachine including means to form a sand mold in a flask, means operativeto invert said flask with the mold therein comprising a piston-cylinderassembly, said assembly first retracting and then extending to completeits inversion stroke, and means in said piston-cylinder assemblyoperative to obtain controlled deceleration on extension only; saidpiston-cylinder assembly including an oil chamber from which oil isforced on extension of said assembly, axially spaced ports in saidchamber successively closed by movement of the piston of said assembly,and bypass means for said ports operative only on retraction.
 14. Afoundry molding machine including means operative to form a sand mold ina flask, means operative to shift said flask with the mold therein fromone station to another comprising a piston-cylinder assembly, saidassembly first retracting and then extending to complete its stroke, andmeans in said piston-cylinder assembly operative to obtain controlleddeceleration on extension only; said piston-cylinder assembly includingan oil chamber from which oil is forced on extension of said assembly,axially spaced ports in said chamber successively closed by movement ofthe piston of said assembly, and bypass means for said ports operativeonly on retraction.
 15. A foundry molding machine comprising a tableoperative to assemble a drag flask and a cope flask with a match platetherebetween, means operative to invert the thus assembled flasks andmatch plate comprising a piston-cylinder assembly, said assembly firstretracting and then extending to complete its inversion stroke, means insaid piston-cylinder assembly operative to obtain controlleddeceleration on extension, and retractible trunnion means operative tosupport such assembled flasks and match plate during inversion.
 16. Amachine as set forth in claim 15 including a key operative to engage theassembled flasks, and means interconnecting the rod end of saidpiston-cylinder assembly with said key to rotate the latter to invertthe flasks.
 17. A machine as set forth in claim 15 wherein said trunnionsupports include pivotally mounted arms, and a piston-cylinder assemblyconnected to each said pivotally mounted arm operative to swing saidarms outwardly on retraction and inwardly or extension.
 18. A foundrymolding machine for producing completed foundry molds including meansoperative at one station to assemble cope and drag flasks with a matchplate therebetween, fill such flasks with sand and ram the sand thereinagainst such match plate, and vertically separate such flasks to drawthe match plate, therefrom; means operative to index such verticallyseparated flasks to a second station, and means at said second stationfor closing and stripping of the flasks from the sand molds therein. 19.A machine as set forth in claim 18 including means at said secondstation to hold the flasks vertically separated to permit coring for apredetermined period.
 20. A machine as set forth in claim 18 whereinsaid means to index such vertically separated flasks comprises apiston-cylinder assembly, said assembly first retracting and thenextending to complete its stroke, and means in said piston-cylinderassembly operative to obtain controlled deceleration on extension.
 21. Amachine as set forth in claim 18 including closing table means at saidsecond station operative to elevate the drag flask against the copeflask then move the sand mold within the assembled cope and drag flasksagainst a fixed abutment to strip thE flasks from the molds.
 22. Amachine as set forth in claim 18 including a closing table at saidsecond station, and means operative to dispense bottom boards onto saidclosing table prior to the elevation of said table to close the moldsand strip the flasks therefrom.
 23. In a match plate molding machine ofthe type using an assembly of paired cope and drag flasks with a matchplate therebetween, means operative to form a sand cake in the dragflask, means operative to fill the cope flask with sand and ram suchsand therein while supporting such assembly on the sand cake in the dragflask, and indexing means to place the paired flasks in alignment withthe match plate, said indexing means comprising a piston-cylinderassembly having controlled deceleration at the end of its indexingstroke.
 24. A foundry molding machine as set forth in claim 18 includinga post between such stations, said means operative to index suchvertically separated flasks rotating such flasks about said post.
 25. Afoundry molding machine as set forth in claim 18 including a center postbetween such stations, flask support means extending from said post, andmeans to rotate said flask support means about said post to index suchflasks between such first and second stations.
 26. A foundry moldingmachine as set forth in claim 18 including a post between such stations,and flask support means extending in opposite directions from said post,each flask support means holding a cope and drag flask verticallyseparated.
 27. In a match plate molding machine of the type using anassembly of paired cope and drag flasks with a match plate therebetween,means operative to fill the drag flask with sand, means operative toinvert such assembly and to fill the cope flask with sand, meansoperative to ram such sand within such cope and drag flasks, meansoperative to separate the match plate from the cope and drag flasksafter the sand molds are rammed therein, means to shift said cope anddrag flasks to another station, and to hold such flasks in verticallyseparated condition for a predetermined time for coring, said means toshift said flasks also positioning another paired cope and drag flask tobe assembled with the match plate while the first pair of flasks is heldfor coring as aforesaid.
 28. A foundry molding machine as set forth inclaim 10 including two stations with a pair of such flasks at eachstation, such pattern being between a pair of such flasks at one stationonly.
 29. A foundry molding machine as set forth in claim 18 includingmeans to support such match plate by itself at said one station as suchvertically separated flasks are indexed to said second station.